private void btnAddBook_Click(object sender, EventArgs e) { BookName = this.txtBookName.Text; Author = this.txtAuthor.Text; IDcategory = comboBoxBookCategory.SelectedValue.ToString(); IDLanguage = comboBoxBookLanguage.SelectedValue.ToString(); ISBN = this.txtISBN.Text; Publisher = this.txtPublisher.Text; Description = this.richTxtBookDescreption.Text; image = this.txtImagePath.Text; if (database.addBook(BookName, Author, IDcategory, IDLanguage, image, ISBN, Publisher, Description)) { MessageBox.Show("Book successfully added"); pictureBox1.Image = Properties.Resources.noimage; txtImagePath.Text = null; txtBookName.Text = null; txtAuthor.Text = null; txtISBN.Text = null; txtPublisher.Text = null; richTxtBookDescreption.Text = null; } else { MessageBox.Show("Book Not added, please check Debug Log"); } }